136203172157 has 4 divisors (see below), whose sum is σ = 146680339260. Its totient is φ = 125726005056.

The previous prime is 136203172141. The next prime is 136203172187. The reversal of 136203172157 is 751271302631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84987408676 + 51215763481 = 291526^2 + 226309^2 .

It is a cyclic number.

It is not a de Polignac number, because 136203172157 - 2⁴ = 136203172141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136203172157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136203172187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5238583532 + ... + 5238583557.

It is an arithmetic number, because the mean of its divisors is an integer number (36670084815).

Almost surely, 2^136203172157 is an apocalyptic number.

It is an amenable number.

136203172157 is a deficient number, since it is larger than the sum of its proper divisors (10477167103).

136203172157 is a wasteful number, since it uses less digits than its factorization.

136203172157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10477167102.

The product of its (nonzero) digits is 52920, while the sum is 38.

Adding to 136203172157 its reverse (751271302631), we get a palindrome (887474474788).

The spelling of 136203172157 in words is "one hundred thirty-six billion, two hundred three million, one hundred seventy-two thousand, one hundred fifty-seven".